Name: Particle Designer
Mac Platform: Intel
OS version: 10.7 or higher
Change log not ready at time of post.
Courtesy of Special K
What is Particle Designer?
Particle Designer 2.0 is a powerful particle effects editor designed specifically for Mac OS X. Choose from a massive user submitted library or design your own unique effects. Limitless possibilities with multiple particle emitters, definable backgrounds, zooming & full-screen. Target hundreds of devices and multiple platforms with support for over 11 frameworks working out the box.
More info: http://particledesigner.71squared.com/